There are two different Fast-Forward technologies, one is for fast forwarding images, the other is for fast forwarding videos.
I guess you initially ordered our image-based surveillance service. CameraFTP Viewer can let you set different speeds when playing image snapshots.
Now you upload video clips, it uses a different fast-forward technology. When you enable fast forwarding, it will play one frame for each 1 minute of video. This feature is relatively new. If you still experience any problems, please contact CameraFTP support via email and tell us more detailed information